Merge branch 'feature/error-collection' into develop

# Conflicts:
#	src/layout/header-aside/components/contextmenu/components/contentmenuList/index.vue


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src/pages/demo/playground/log/error/index.vue

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+<template>
+  <d2-container>
+    <template slot="header">捕获错误信息</template>
+    <p class="d2-mt-0">请打开浏览器控制台，然后点击下面的按钮</p>
+    <el-button type="danger" @click="handleNewError">触发一个错误</el-button>
+  </d2-container>
+</template>
+
+<script>
+export default {
+  methods: {
+    handleNewError () {
+      console.log(a) // eslint-disable-line
+    }
+  }
+}
+</script>

src/pages/demo/playground/log/log/index.vue

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+<template>
+  <d2-container>
+    <template slot="header">记录日志内容</template>
+    <p class="d2-mt-0">在下方输入你要记录的日志，然后点击记录按钮</p>
+    <el-input
+      v-model="text"
+      placeholder="日志内容"
+      class="d2-mr-10"
+      style="width: 200px;"/>
+    <el-button type="primary" @click="handleAdd">记录</el-button>
+  </d2-container>
+</template>
+
+<script>
+export default {
+  data () {
+    return {
+      text: 'D2Admin log info'
+    }
+  },
+  methods: {
+    handleAdd () {
+      this.$logAdd(this.text)
+    }
+  }
+}
+</script>